<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Hook Functions: GLib Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="GLib Reference Manual">
<link rel="up" href="glib-utilities.html" title="GLib Utilities">
<link rel="prev" href="glib-Random-Numbers.html" title="Random Numbers">
<link rel="next" href="glib-Miscellaneous-Utility-Functions.html" title="Miscellaneous Utility Functions">
<meta name="generator" content="GTK-Doc V1.24 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#glib-Hook-Functions.description" class="shortcut">Description</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="glib-utilities.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="glib-Random-Numbers.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="glib-Miscellaneous-Utility-Functions.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="glib-Hook-Functions"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="glib-Hook-Functions.top_of_page"></a>Hook Functions</span></h2>
<p>Hook Functions — support for manipulating lists of hook functions</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="glib-Hook-Functions.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Hook-Functions.html#GHookFinalizeFunc" title="GHookFinalizeFunc ()">*GHookFinalizeFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Hook-Functions.html#GHookFunc" title="GHookFunc ()">*GHookFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Hook-Functions.html#GHookCheckFunc" title="GHookCheckFunc ()">*GHookCheckFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-list-init" title="g_hook_list_init ()">g_hook_list_init</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-list-invoke" title="g_hook_list_invoke ()">g_hook_list_invoke</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-list-invoke-check" title="g_hook_list_invoke_check ()">g_hook_list_invoke_check</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-list-marshal" title="g_hook_list_marshal ()">g_hook_list_marshal</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Hook-Functions.html#GHookMarshaller" title="GHookMarshaller ()">*GHookMarshaller</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-list-marshal-check" title="g_hook_list_marshal_check ()">g_hook_list_marshal_check</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Hook-Functions.html#GHookCheckMarshaller" title="GHookCheckMarshaller ()">*GHookCheckMarshaller</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-list-clear" title="g_hook_list_clear ()">g_hook_list_clear</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-alloc" title="g_hook_alloc ()">g_hook_alloc</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-append" title="g_hook_append()">g_hook_append</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-prepend" title="g_hook_prepend ()">g_hook_prepend</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-insert-before" title="g_hook_insert_before ()">g_hook_insert_before</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-insert-sorted" title="g_hook_insert_sorted ()">g_hook_insert_sorted</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gint" title="gint ()"><span class="returnvalue">gint</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Hook-Functions.html#GHookCompareFunc" title="GHookCompareFunc ()">*GHookCompareFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gint" title="gint ()"><span class="returnvalue">gint</span></a>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-compare-ids" title="g_hook_compare_ids ()">g_hook_compare_ids</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-get" title="g_hook_get ()">g_hook_get</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-find" title="g_hook_find ()">g_hook_find</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="glib-Hook-Functions.html#GHookFindFunc" title="GHookFindFunc ()">*GHookFindFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-find-data" title="g_hook_find_data ()">g_hook_find_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-find-func" title="g_hook_find_func ()">g_hook_find_func</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-find-func-data" title="g_hook_find_func_data ()">g_hook_find_func_data</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-first-valid" title="g_hook_first_valid ()">g_hook_first_valid</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-next-valid" title="g_hook_next_valid ()">g_hook_next_valid</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#G-HOOK-FLAGS:CAPS" title="G_HOOK_FLAGS()">G_HOOK_FLAGS</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#G-HOOK:CAPS" title="G_HOOK()">G_HOOK</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#G-HOOK-IS-VALID:CAPS" title="G_HOOK_IS_VALID()">G_HOOK_IS_VALID</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#G-HOOK-ACTIVE:CAPS" title="G_HOOK_ACTIVE()">G_HOOK_ACTIVE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#G-HOOK-IN-CALL:CAPS" title="G_HOOK_IN_CALL()">G_HOOK_IN_CALL</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#G-HOOK-IS-UNLINKED:CAPS" title="G_HOOK_IS_UNLINKED()">G_HOOK_IS_UNLINKED</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-ref" title="g_hook_ref ()">g_hook_ref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-unref" title="g_hook_unref ()">g_hook_unref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-free" title="g_hook_free ()">g_hook_free</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-destroy" title="g_hook_destroy ()">g_hook_destroy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="glib-Hook-Functions.html#g-hook-destroy-link" title="g_hook_destroy_link ()">g_hook_destroy_link</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="glib-Hook-Functions.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList">GHookList</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook">GHook</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="glib-Hook-Functions.html#GHookFlagMask" title="enum GHookFlagMask">GHookFlagMask</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="glib-Hook-Functions.html#G-HOOK-FLAG-USER-SHIFT:CAPS" title="G_HOOK_FLAG_USER_SHIFT">G_HOOK_FLAG_USER_SHIFT</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="glib-Hook-Functions.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;glib.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="glib-Hook-Functions.description"></a><h2>Description</h2>
<p>The <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>, <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> and their related functions provide support for
lists of hook functions. Functions can be added and removed from the lists,
and the list of hook functions can be invoked.</p>
</div>
<div class="refsect1">
<a name="glib-Hook-Functions.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GHookFinalizeFunc"></a><h3>GHookFinalizeFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GHookFinalizeFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                      <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>);</pre>
<p>Defines the type of function to be called when a hook in a
list of hooks gets finalized.</p>
<div class="refsect3">
<a name="id-1.5.13.7.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the hook in <em class="parameter"><code>hook_list</code></em>
that gets finalized</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHookFunc"></a><h3>GHookFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GHookFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Defines the type of a hook function that can be invoked
by <a class="link" href="glib-Hook-Functions.html#g-hook-list-invoke" title="g_hook_list_invoke ()"><code class="function">g_hook_list_invoke()</code></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>the data field of the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is passed to the hook function here</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHookCheckFunc"></a><h3>GHookCheckFunc ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GHookCheckFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Defines the type of a hook function that can be invoked
by <a class="link" href="glib-Hook-Functions.html#g-hook-list-invoke-check" title="g_hook_list_invoke_check ()"><code class="function">g_hook_list_invoke_check()</code></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>the data field of the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is passed to the hook function here</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.4.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> should be destroyed</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-list-init"></a><h3>g_hook_list_init ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_list_init (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                  <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> hook_size</code></em>);</pre>
<p>Initializes a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.
This must be called before the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> is used.</p>
<div class="refsect3">
<a name="id-1.5.13.7.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook_size</p></td>
<td class="parameter_description"><p>the size of each element in the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>,
typically <code class="literal">sizeof (GHook)</code>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-list-invoke"></a><h3>g_hook_list_invoke ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_list_invoke (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                    <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> may_recurse</code></em>);</pre>
<p>Calls all of the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> functions in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>may_recurse</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if functions which are already running
(e.g. in another thread) can be called. If set to <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>,
these are skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-list-invoke-check"></a><h3>g_hook_list_invoke_check ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_list_invoke_check (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                          <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> may_recurse</code></em>);</pre>
<p>Calls all of the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> functions in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.
Any function which returns <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> is removed from the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>may_recurse</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if functions which are already running
(e.g. in another thread) can be called. If set to <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>,
these are skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-list-marshal"></a><h3>g_hook_list_marshal ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_list_marshal (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                     <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> may_recurse</code></em>,
                     <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookMarshaller" title="GHookMarshaller ()"><span class="type">GHookMarshaller</span></a> marshaller</code></em>,
                     <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> marshal_data</code></em>);</pre>
<p>Calls a function on each valid <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.8.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>may_recurse</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if hooks which are currently running
(e.g. in another thread) are considered valid. If set to <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>,
these are skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>marshaller</p></td>
<td class="parameter_description"><p>the function to call for each <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>marshal_data</p></td>
<td class="parameter_description"><p>data to pass to <em class="parameter"><code>marshaller</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHookMarshaller"></a><h3>GHookMarshaller ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GHookMarshaller<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>,
                    <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> marshal_data</code></em>);</pre>
<p>Defines the type of function used by <a class="link" href="glib-Hook-Functions.html#g-hook-list-marshal" title="g_hook_list_marshal ()"><code class="function">g_hook_list_marshal()</code></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.9.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>marshal_data</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-list-marshal-check"></a><h3>g_hook_list_marshal_check ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_list_marshal_check (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                           <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> may_recurse</code></em>,
                           <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookCheckMarshaller" title="GHookCheckMarshaller ()"><span class="type">GHookCheckMarshaller</span></a> marshaller</code></em>,
                           <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> marshal_data</code></em>);</pre>
<p>Calls a function on each valid <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> and destroys it if the
function returns <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.10.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>may_recurse</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if hooks which are currently running
(e.g. in another thread) are considered valid. If set to <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>,
these are skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>marshaller</p></td>
<td class="parameter_description"><p>the function to call for each <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>marshal_data</p></td>
<td class="parameter_description"><p>data to pass to <em class="parameter"><code>marshaller</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHookCheckMarshaller"></a><h3>GHookCheckMarshaller ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GHookCheckMarshaller<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>,
                         <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> marshal_data</code></em>);</pre>
<p>Defines the type of function used by <a class="link" href="glib-Hook-Functions.html#g-hook-list-marshal-check" title="g_hook_list_marshal_check ()"><code class="function">g_hook_list_marshal_check()</code></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.11.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>marshal_data</p></td>
<td class="parameter_description"><p>user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.11.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a> if <em class="parameter"><code>hook</code></em>
should be destroyed</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-list-clear"></a><h3>g_hook_list_clear ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_list_clear (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>);</pre>
<p>Removes all the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements from a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.12.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-alloc"></a><h3>g_hook_alloc ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_alloc (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>);</pre>
<p>Allocates space for a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> and initializes it.</p>
<div class="refsect3">
<a name="id-1.5.13.7.13.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.13.6"></a><h4>Returns</h4>
<p> a new <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-append"></a><h3>g_hook_append()</h3>
<pre class="programlisting">#define             g_hook_append( hook_list, hook )</pre>
<p>Appends a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> onto the end of a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.14.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to add to the end of <em class="parameter"><code>hook_list</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-prepend"></a><h3>g_hook_prepend ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_prepend (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>);</pre>
<p>Prepends a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> on the start of a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.15.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to add to the start of <em class="parameter"><code>hook_list</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-insert-before"></a><h3>g_hook_insert_before ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_insert_before (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                      <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *sibling</code></em>,
                      <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>);</pre>
<p>Inserts a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> into a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>, before a given <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.16.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sibling</p></td>
<td class="parameter_description"><p> the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to insert the new <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> before. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to insert</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-insert-sorted"></a><h3>g_hook_insert_sorted ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_insert_sorted (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                      <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>,
                      <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookCompareFunc" title="GHookCompareFunc ()"><span class="type">GHookCompareFunc</span></a> func</code></em>);</pre>
<p>Inserts a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> into a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>, sorted by the given function.</p>
<div class="refsect3">
<a name="id-1.5.13.7.17.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to insert</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>the comparison function used to sort the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHookCompareFunc"></a><h3>GHookCompareFunc ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gint" title="gint ()"><span class="returnvalue">gint</span></a>
<span class="c_punctuation">(</span>*GHookCompareFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *new_hook</code></em>,
                     <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *sibling</code></em>);</pre>
<p>Defines the type of function used to compare <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements in
<a class="link" href="glib-Hook-Functions.html#g-hook-insert-sorted" title="g_hook_insert_sorted ()"><code class="function">g_hook_insert_sorted()</code></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.18.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>new_hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> being inserted</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sibling</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to compare with <em class="parameter"><code>new_hook</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.18.6"></a><h4>Returns</h4>
<p> a value &lt;= 0 if <em class="parameter"><code>new_hook</code></em>
should be before <em class="parameter"><code>sibling</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-compare-ids"></a><h3>g_hook_compare_ids ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gint" title="gint ()"><span class="returnvalue">gint</span></a>
g_hook_compare_ids (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *new_hook</code></em>,
                    <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *sibling</code></em>);</pre>
<p>Compares the ids of two <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements, returning a negative value
if the second id is greater than the first.</p>
<div class="refsect3">
<a name="id-1.5.13.7.19.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>new_hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>sibling</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to compare with <em class="parameter"><code>new_hook</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.19.6"></a><h4>Returns</h4>
<p> a value &lt;= 0 if the id of <em class="parameter"><code>sibling</code></em>
is &gt;= the id of <em class="parameter"><code>new_hook</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-get"></a><h3>g_hook_get ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_get (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
            <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a> hook_id</code></em>);</pre>
<p>Returns the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> with the given id, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if it is not found.</p>
<div class="refsect3">
<a name="id-1.5.13.7.20.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook_id</p></td>
<td class="parameter_description"><p>a hook id</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.20.6"></a><h4>Returns</h4>
<p> the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> with the given id, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if it is not found</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-find"></a><h3>g_hook_find ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_find (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
             <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> need_valids</code></em>,
             <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookFindFunc" title="GHookFindFunc ()"><span class="type">GHookFindFunc</span></a> func</code></em>,
             <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Finds a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> using the given function to
test for a match.</p>
<div class="refsect3">
<a name="id-1.5.13.7.21.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>need_valids</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements which have been destroyed
should be skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>the function to call for each <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>, which should return
<a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> when the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> has been found</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>the data to pass to <em class="parameter"><code>func</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.21.6"></a><h4>Returns</h4>
<p> the found <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if no matching <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is found</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHookFindFunc"></a><h3>GHookFindFunc ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
<span class="c_punctuation">(</span>*GHookFindFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>,
                  <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Defines the type of the function passed to <a class="link" href="glib-Hook-Functions.html#g-hook-find" title="g_hook_find ()"><code class="function">g_hook_find()</code></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.22.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>user data passed to <a class="link" href="glib-Hook-Functions.html#g-hook-find-func" title="g_hook_find_func ()"><code class="function">g_hook_find_func()</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.22.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the required <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> has been found</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-find-data"></a><h3>g_hook_find_data ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_find_data (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                  <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> need_valids</code></em>,
                  <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Finds a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> with the given data.</p>
<div class="refsect3">
<a name="id-1.5.13.7.23.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>need_valids</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements which have been destroyed
should be skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>the data to find</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.23.6"></a><h4>Returns</h4>
<p> the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> with the given <em class="parameter"><code>data</code></em>
or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if no matching
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is found</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-find-func"></a><h3>g_hook_find_func ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_find_func (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                  <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> need_valids</code></em>,
                  <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> func</code></em>);</pre>
<p>Finds a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> with the given function.</p>
<div class="refsect3">
<a name="id-1.5.13.7.24.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>need_valids</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements which have been destroyed
should be skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>the function to find</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.24.6"></a><h4>Returns</h4>
<p> the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> with the given <em class="parameter"><code>func</code></em>
or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if no matching
<a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is found</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-find-func-data"></a><h3>g_hook_find_func_data ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_find_func_data (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                       <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> need_valids</code></em>,
                       <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> func</code></em>,
                       <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Finds a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> with the given function and data.</p>
<div class="refsect3">
<a name="id-1.5.13.7.25.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>need_valids</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> elements which have been destroyed
should be skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p> the function to find. </p></td>
<td class="parameter_annotations"><span class="annotation">[not nullable]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>the data to find</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.25.6"></a><h4>Returns</h4>
<p> the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> with the given <em class="parameter"><code>func</code></em>
and <em class="parameter"><code>data</code></em>
or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if
no matching <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is found</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-first-valid"></a><h3>g_hook_first_valid ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_first_valid (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                    <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> may_be_in_call</code></em>);</pre>
<p>Returns the first <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> which has not been destroyed.
The reference count for the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is incremented, so you must call
<a class="link" href="glib-Hook-Functions.html#g-hook-unref" title="g_hook_unref ()"><code class="function">g_hook_unref()</code></a> to restore it when no longer needed. (Or call
<a class="link" href="glib-Hook-Functions.html#g-hook-next-valid" title="g_hook_next_valid ()"><code class="function">g_hook_next_valid()</code></a> if you are stepping through the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.)</p>
<div class="refsect3">
<a name="id-1.5.13.7.26.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>may_be_in_call</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if hooks which are currently running
(e.g. in another thread) are considered valid. If set to <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>,
these are skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.26.6"></a><h4>Returns</h4>
<p> the first valid <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if none are valid</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-next-valid"></a><h3>g_hook_next_valid ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_next_valid (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                   <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>,
                   <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="type">gboolean</span></a> may_be_in_call</code></em>);</pre>
<p>Returns the next <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> which has not been destroyed.
The reference count for the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is incremented, so you must call
<a class="link" href="glib-Hook-Functions.html#g-hook-unref" title="g_hook_unref ()"><code class="function">g_hook_unref()</code></a> to restore it when no longer needed. (Or continue to call
<a class="link" href="glib-Hook-Functions.html#g-hook-next-valid" title="g_hook_next_valid ()"><code class="function">g_hook_next_valid()</code></a> until <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> is returned.)</p>
<div class="refsect3">
<a name="id-1.5.13.7.27.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the current <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>may_be_in_call</p></td>
<td class="parameter_description"><p><a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if hooks which are currently running
(e.g. in another thread) are considered valid. If set to <a class="link" href="glib-Standard-Macros.html#FALSE:CAPS" title="FALSE"><code class="literal">FALSE</code></a>,
these are skipped</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.27.6"></a><h4>Returns</h4>
<p> the next valid <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>, or <a class="link" href="glib-Standard-Macros.html#NULL:CAPS" title="NULL"><code class="literal">NULL</code></a> if none are valid</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="G-HOOK-FLAGS:CAPS"></a><h3>G_HOOK_FLAGS()</h3>
<pre class="programlisting">#define G_HOOK_FLAGS(hook)		(G_HOOK (hook)-&gt;flags)
</pre>
<p>Gets the flags of a hook.</p>
<div class="refsect3">
<a name="id-1.5.13.7.28.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="G-HOOK:CAPS"></a><h3>G_HOOK()</h3>
<pre class="programlisting">#define G_HOOK(hook)			((GHook*) (hook))
</pre>
<p>Casts a pointer to a <code class="literal">GHook*</code>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.29.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a pointer</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="G-HOOK-IS-VALID:CAPS"></a><h3>G_HOOK_IS_VALID()</h3>
<pre class="programlisting">#define             G_HOOK_IS_VALID(hook)</pre>
<p>Returns <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is valid, i.e. it is in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>,
it is active and it has not been destroyed.</p>
<div class="refsect3">
<a name="id-1.5.13.7.30.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.30.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is valid</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="G-HOOK-ACTIVE:CAPS"></a><h3>G_HOOK_ACTIVE()</h3>
<pre class="programlisting">#define             G_HOOK_ACTIVE(hook)</pre>
<p>Returns <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is active, which is normally the case
until the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is destroyed.</p>
<div class="refsect3">
<a name="id-1.5.13.7.31.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.31.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is active</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="G-HOOK-IN-CALL:CAPS"></a><h3>G_HOOK_IN_CALL()</h3>
<pre class="programlisting">#define             G_HOOK_IN_CALL(hook)</pre>
<p>Returns <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> function is currently executing.</p>
<div class="refsect3">
<a name="id-1.5.13.7.32.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.32.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> function is currently executing</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="G-HOOK-IS-UNLINKED:CAPS"></a><h3>G_HOOK_IS_UNLINKED()</h3>
<pre class="programlisting">#define             G_HOOK_IS_UNLINKED(hook)</pre>
<p>Returns <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is not in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.33.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.33.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is not in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-ref"></a><h3>g_hook_ref ()</h3>
<pre class="programlisting"><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="returnvalue">GHook</span></a> *
g_hook_ref (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
            <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>);</pre>
<p>Increments the reference count for a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.34.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to increment the reference count of</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.34.6"></a><h4>Returns</h4>
<p> the <em class="parameter"><code>hook</code></em>
that was passed in (since 2.6)</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-unref"></a><h3>g_hook_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_unref (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
              <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>);</pre>
<p>Decrements the reference count of a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>.
If the reference count falls to 0, the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> is removed
from the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> and <a class="link" href="glib-Hook-Functions.html#g-hook-free" title="g_hook_free ()"><code class="function">g_hook_free()</code></a> is called to free it.</p>
<div class="refsect3">
<a name="id-1.5.13.7.35.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to unref</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-free"></a><h3>g_hook_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_free (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
             <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>);</pre>
<p>Calls the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> <em class="parameter"><code>finalize_hook</code></em>
 function if it exists,
and frees the memory allocated for the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.7.36.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to free</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-destroy"></a><h3>g_hook_destroy ()</h3>
<pre class="programlisting"><a class="link" href="glib-Basic-Types.html#gboolean" title="gboolean"><span class="returnvalue">gboolean</span></a>
g_hook_destroy (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                <em class="parameter"><code><a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a> hook_id</code></em>);</pre>
<p>Destroys a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a>, given its ID.</p>
<div class="refsect3">
<a name="id-1.5.13.7.37.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook_id</p></td>
<td class="parameter_description"><p>a hook ID</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.13.7.37.6"></a><h4>Returns</h4>
<p> <a class="link" href="glib-Standard-Macros.html#TRUE:CAPS" title="TRUE"><code class="literal">TRUE</code></a> if the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> was found in the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> and destroyed</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-hook-destroy-link"></a><h3>g_hook_destroy_link ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_hook_destroy_link (<em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> *hook_list</code></em>,
                     <em class="parameter"><code><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *hook</code></em>);</pre>
<p>Removes one <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> from a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>, marking it
inactive and calling <a class="link" href="glib-Hook-Functions.html#g-hook-unref" title="g_hook_unref ()"><code class="function">g_hook_unref()</code></a> on it.</p>
<div class="refsect3">
<a name="id-1.5.13.7.38.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>hook_list</p></td>
<td class="parameter_description"><p>a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>hook</p></td>
<td class="parameter_description"><p>the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="glib-Hook-Functions.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GHookList"></a><h3>struct GHookList</h3>
<pre class="programlisting">struct GHookList {
  gulong	    seq_id;
  guint		    hook_size : 16;
  guint		    is_setup : 1;
  GHook		   *hooks;
  gpointer	    dummy3;
  GHookFinalizeFunc finalize_hook;
  gpointer	    dummy[2];
};
</pre>
<p>The <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> struct represents a list of hook functions.</p>
<div class="refsect3">
<a name="id-1.5.13.8.2.5"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a> <em class="structfield"><code><a name="GHookList.seq-id"></a>seq_id</code></em>;</p></td>
<td class="struct_member_description"><p>the next free <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> id</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> <em class="structfield"><code><a name="GHookList.hook-size"></a>hook_size</code></em> : 16;</p></td>
<td class="struct_member_description"><p>the size of the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> elements, in bytes</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> <em class="structfield"><code><a name="GHookList.is-setup"></a>is_setup</code></em> : 1;</p></td>
<td class="struct_member_description"><p>1 if the <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> has been initialized</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *<em class="structfield"><code><a name="GHookList.hooks"></a>hooks</code></em>;</p></td>
<td class="struct_member_description"><p>the first <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> element in the list</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> <em class="structfield"><code><a name="GHookList.dummy3"></a>dummy3</code></em>;</p></td>
<td class="struct_member_description"><p>unused</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Hook-Functions.html#GHookFinalizeFunc" title="GHookFinalizeFunc ()"><span class="type">GHookFinalizeFunc</span></a> <em class="structfield"><code><a name="GHookList.finalize-hook"></a>finalize_hook</code></em>;</p></td>
<td class="struct_member_description"><p>the function to call to finalize a <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> element.
The default behaviour is to call the hooks <em class="parameter"><code>destroy</code></em>
function</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> <em class="structfield"><code><a name="GHookList.dummy"></a>dummy</code></em>[2];</p></td>
<td class="struct_member_description"><p>unused</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHook"></a><h3>struct GHook</h3>
<pre class="programlisting">struct GHook {
  gpointer	 data;
  GHook		*next;
  GHook		*prev;
  guint		 ref_count;
  gulong	 hook_id;
  guint		 flags;
  gpointer	 func;
  GDestroyNotify destroy;
};
</pre>
<p>The <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> struct represents a single hook function in a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a>.</p>
<div class="refsect3">
<a name="id-1.5.13.8.3.5"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> <em class="structfield"><code><a name="GHook.data"></a>data</code></em>;</p></td>
<td class="struct_member_description"><p>data which is passed to func when this hook is invoked</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *<em class="structfield"><code><a name="GHook.next"></a>next</code></em>;</p></td>
<td class="struct_member_description"><p>pointer to the next hook in the list</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> *<em class="structfield"><code><a name="GHook.prev"></a>prev</code></em>;</p></td>
<td class="struct_member_description"><p>pointer to the previous hook in the list</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> <em class="structfield"><code><a name="GHook.ref-count"></a>ref_count</code></em>;</p></td>
<td class="struct_member_description"><p>the reference count of this hook</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#gulong" title="gulong"><span class="type">gulong</span></a> <em class="structfield"><code><a name="GHook.hook-id"></a>hook_id</code></em>;</p></td>
<td class="struct_member_description"><p>the id of this hook, which is unique within its list</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#guint" title="guint ()"><span class="type">guint</span></a> <em class="structfield"><code><a name="GHook.flags"></a>flags</code></em>;</p></td>
<td class="struct_member_description"><p>flags which are set for this hook. See <a class="link" href="glib-Hook-Functions.html#GHookFlagMask" title="enum GHookFlagMask"><span class="type">GHookFlagMask</span></a> for
predefined flags</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Basic-Types.html#gpointer" title="gpointer"><span class="type">gpointer</span></a> <em class="structfield"><code><a name="GHook.func"></a>func</code></em>;</p></td>
<td class="struct_member_description"><p>the function to call when this hook is invoked. The possible
signatures for this function are <a class="link" href="glib-Hook-Functions.html#GHookFunc" title="GHookFunc ()"><span class="type">GHookFunc</span></a> and <a class="link" href="glib-Hook-Functions.html#GHookCheckFunc" title="GHookCheckFunc ()"><span class="type">GHookCheckFunc</span></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="glib-Datasets.html#GDestroyNotify" title="GDestroyNotify ()"><span class="type">GDestroyNotify</span></a> <em class="structfield"><code><a name="GHook.destroy"></a>destroy</code></em>;</p></td>
<td class="struct_member_description"><p>the default <em class="parameter"><code>finalize_hook</code></em>
function of a <a class="link" href="glib-Hook-Functions.html#GHookList" title="struct GHookList"><span class="type">GHookList</span></a> calls
this member of the hook that is being finalized</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GHookFlagMask"></a><h3>enum GHookFlagMask</h3>
<p>Flags used internally in the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> implementation.</p>
<div class="refsect3">
<a name="id-1.5.13.8.4.4"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="G-HOOK-FLAG-ACTIVE:CAPS"></a>G_HOOK_FLAG_ACTIVE</p></td>
<td class="enum_member_description">
<p>set if the hook has not been destroyed</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-HOOK-FLAG-IN-CALL:CAPS"></a>G_HOOK_FLAG_IN_CALL</p></td>
<td class="enum_member_description">
<p>set if the hook is currently being run</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-HOOK-FLAG-MASK:CAPS"></a>G_HOOK_FLAG_MASK</p></td>
<td class="enum_member_description">
<p>A mask covering all bits reserved for
  hook flags; see <a class="link" href="glib-Hook-Functions.html#G-HOOK-FLAG-USER-SHIFT:CAPS" title="G_HOOK_FLAG_USER_SHIFT"><code class="literal">G_HOOK_FLAG_USER_SHIFT</code></a></p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="G-HOOK-FLAG-USER-SHIFT:CAPS"></a><h3>G_HOOK_FLAG_USER_SHIFT</h3>
<pre class="programlisting">#define G_HOOK_FLAG_USER_SHIFT (4)
</pre>
<p>The position of the first bit which is not reserved for internal
use be the <a class="link" href="glib-Hook-Functions.html#GHook" title="struct GHook"><span class="type">GHook</span></a> implementation, i.e.
<code class="literal">1 &lt;&lt; G_HOOK_FLAG_USER_SHIFT</code> is the first
bit which can be used for application-defined flags.</p>
</div>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.24</div>
</body>
</html>